I had some stuff stolen a while back.I don't know how big of city you live in,but I made a list of everything that was stolen and gave it to every pawn/hawk shop for a 100 miles.I asked them that if they see anything like this please contact the police(I also had the SN from 2 of the rifles).About a year later I was called from a county sherrif about 2 hr drive they had my guns and a guy who stole it.I never did get ALL of it back but I go some and a little justice(I would have rather kicked the crap outta him).

I'am sorry that this has happened to you,and since you mentioned that you might know him/them.I would start looking at motives and alibies.
BBJ